Washington: Today - Sunny, high near 40, low in the low 20s. The chance of precipitation is near zero through tonight. Thursday - Fair, high in the mid 40s.

Maryland and Virginia: Today - Sunny, highs from the 30s to the mid 40s, lows in the 20s. Thursday - Fair, highs in the 40s.

Lower Potomac and Chesapeake Bay Today - Fair with visibility of more than 5 inches. Wind will be from the southeast at from 10 to 15 knots through tonight. Waves in unprotected waters will be less than 3 feet.

Extended Area Forecast for Friday through Sunday: Partly cloudy through the period. Highs will be from the upper 30s to the 40s, lows in the 20s. Normal Washington temperatures for the period are a high of 43 and a low of 28.

West Virginia: Today - Partly cloudy, highs from the 30s to the low 40s, lows from the from the teens to the 20s. Thursday - Partly cloudy, highs in the 40s.

The National Weather Forecast for today - Snow is expected from Montana across the northern and central intermountain regions.Rain is expected across all of the Pacific Coast, but will be more likely from northern California into British Columbia. Some snow may fall across the lower Great Lakes. Eastern Montana will experience very cold temperatures, while midwestern Texas and eastern Colorado across Kansas and Oklahoma and into eastern Missouri. Cold temperatures will prevail else where. Cloudy skies will also cover North Dakota, northern Minnesota and upper Michigan. Southern Texas will be cloudy also. Most stormy skies will rule over the rest of the region.

The Council of Government's Air Quality Index for yesterday showed the high reading in the Washington area during the 2 p.m. to 3 p.m. period was 17 for the pollutant, monochemical oxidants. Index values between zero and 24 indicate good air quality. When the index exceeds 101 the air is considered very unhealthy and individuals with lung, heart and eye ailments are urged to restrict their activity. The forecast for today indicates that the air quality will be good.

The National Weather Service forecasts the Potomac River stage at Little Falls should be near 3.5 fleet today. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnt.(COLUMN)29(COLUMN)51 1 a.m.(COLUMN)28(COLUMN)51 2 a.m.(COLUMN)29(COLUMN)41 3 a.m.(COLUMN)27(COLUMN)46 4 a.m.(COLUMN)27(COLUMN)46 5 a.m.(COLUMN)26(COLUMN)46 6 a.m.(COLUMN)26(COLUMN)46 7 a.m.(COLUMN)25(COLUMN)46 8 a.m.(COLUMN)25(COLUMN)46 9 a.m.(COLUMN)27(COLUMN)42 10 a.m.(COLUMN)30(COLUMN)39 11 a.m.(COLUMN)32(COLUMN)36 12 noon(COLUMN)33(COLUMN)39 1 p.m.(COLUMN)34(COLUMN)33 2 p.m.(COLUMN)35(COLUMN)33 3 p.m.(COLUMN)35(COLUMN)33 4 p.m.(COLUMN)34(COLUMN)36 5 p.m.(COLUMN)32(COLUMN)3 6 p.m.(COLUMN)28(COLUMN)45 7 p.m.(COLUMN)27(COLUMN)44(END TABLE) Temperatures ending 8 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)24(COLUMN)11 Albuquerque(COLUMN)42(COLUMN)25 Amarillo(COLUMN)33(COLUMN)17 Anchorage(COLUMN)19(COLUMN)6 Asheville(COLUMN)34(COLUMN)17 Atlanta(COLUMN)37(COLUMN)20 Atlantic City(COLUMN)34(COLUMN)21 Austin(COLUMN)42(COLUMN)27 Baltimore(COLUMN)27(COLUMN)23 Billings(COLUMN)29(COLUMN)13 Birmingham(COLUMN)35(COLUMN)18 Bismarck(COLUMN)17(COLUMN)-10 Boise(COLUMN)30(COLUMN)25 Boston(COLUMN)30(COLUMN)22 Brownsville(COLUMN)42(COLUMN)37 Buffalo(COLUMN)25(COLUMN)11 Burmingham(COLUMN)19(COLUMN)3 Casper(COLUMN)23(COLUMN)17 Charleston, S.C.(COLUMN)50(COLUMN)32 Charleston, W.Va.(COLUMN)28(COLUMN)18 Charlotte(COLUMN)43(COLUMN)22 Cheyenne(COLUMN)37(COLUMN)24 Chicago(COLUMN)13(COLUMN)4 Cincinnati(COLUMN)19(COLUMN)6 Cleveland(COLUMN)26(COLUMN)5 Columbia, S.C.(COLUMN)46(COLUMN)22 Columbus(COLUMN)27(COLUMN)13 Dal.-Ft. Worth(COLUMN)41(COLUMN)22 Dayton(COLUMN)23(COLUMN)9 Denver(COLUMN)45(COLUMN)19 Des Moines(COLUMN)17(COLUMN)-1 Detroit(COLUMN)20(COLUMN)5 Duluth(COLUMN)13(COLUMN) 0 El Paso(COLUMN)46(COLUMN)30 Fairbanks(COLUMN)3(COLUMN)-10 Fargo(COLUMN)15(COLUMN)zero Flagstaff(COLUMN)46(COLUMN)25 Great Plains(COLUMN)24(COLUMN)13 Hartford(COLUMN)26(COLUMN)11 Helena(COLUMN)-5(COLUMN)-19 Honolulu(COLUMN)81(COLUMN)65 Houston(COLUMN)40(COLUMN)32 Indianapolis(COLUMN)23(COLUMN)10 Jackson, Miss.(COLUMN)40(COLUMN)16 Jacksonville(COLUMN)57(COLUMN)36 Juneau(COLUMN)21(COLUMN)7 Kansas City(COLUMN)34(COLUMN)14 Las Vegas(COLUMN)53(COLUMN)36 Little Rock(COLUMN)35(COLUMN)23 Los Angeles(COLUMN)66(COLUMN)50 Louisville(COLUMN)24(COLUMN)17 Memphis(COLUMN)32(COLUMN)24 Miami Beach(COLUMN)74(COLUMN)61 Midland-Odessa(COLUMN)37(COLUMN)24 Milwaukee(COLUMN)13(COLUMN)2 Mpls.-St. Paul(COLUMN)16(COLUMN)-4 Nashville(COLUMN)29(COLUMN)14 New Orleans(COLUMN)48(COLUMN)34 New York(COLUMN)32(COLUMN)17 Norfolk(COLUMN)43(COLUMN)30 North Platte(COLUMN)29(COLUMN)-7 Oklahoma City(COLUMN)42(COLUMN)22 Omaha(COLUMN)21(COLUMN)9 Orlando(COLUMN)66(COLUMN)44 Philadelphia(COLUMN)34(COLUMN)15 Phoenix(COLUMN)69(COLUMN)48 Pittsburgh(COLUMN)28(COLUMN)12 Portland, Maine(COLUMN)21(COLUMN)8 Portland, Ore.(COLUMN)33(COLUMN)24 Providence(COLUMN)26(COLUMN)13 Raleigh(COLUMN)44(COLUMN)22 Rapid City(COLUMN)24(COLUMN)9 Reno(COLUMN)39(COLUMN)30 Richmond(COLUMN)42(COLUMN)23 St. Louis(COLUMN)32(COLUMN)12 St. Pbg.-Tampa(COLUMN)64(COLUMN)44 Salt Lake City(COLUMN)32(COLUMN)27 San Antonio(COLUMN)40(COLUMN)25 San Diego(COLUMN)65(COLUMN)56 San Francisco(COLUMN)57(COLUMN)53 San Juan(COLUMN)85(COLUMN)71 St. Ste. Marie(COLUMN)16(COLUMN)1 Seattle(COLUMN)43(COLUMN)33 Shreveport(COLUMN)43(COLUMN)16 Sioux Falls(COLUMN)14(COLUMN)-11 Spokane(COLUMN)12(COLUMN)11 Syracuse(COLUMN)29(COLUMN)14 Topeka(COLUMN)34(COLUMN)6 Tucson(COLUMN)66(COLUMN)45 Tulsa(COLUMN)42(COLUMN)21 Washington(COLUMN)41(COLUMN)25 Wichita(COLUMN)46(COLUMN)15(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)36 Amsterdam(COLUMN)rain(COLUMN)1 p.m.(COLUMN)39 Ankara(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)34 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)50 Auckland(COLUMN)clear(COLUMN)midnt.(COLUMN)59 Berlin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)29 Birmingham(COLUMN)clear(COLUMN)1 p.m.(COLUMN)43 Brussels(COLUMN)rain(COLUMN)1 p.m.(COLUMN) Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)69 Copenhagen(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)37 Dublin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)41 Geneva(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)45 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)59 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)57 London(COLUMN)clear(COLUMN)1 p.m.(COLUMN)45 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)50 Malta(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)56 Manila(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)79 Moscow(COLUMN)snow(COLUMN)3 p.m.(COLUMN)34 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)63 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)57 Oslo(COLUMN)clear(COLUMN)1 p.m.(COLUMN)16 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)25 Rome(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)55 Saigon(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)81 Sofia(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)29 Stockholm(COLUMN)clear(COLUMN)1 p.m.(COLUMN)29 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)36 Tel Aviv(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)55 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)39 Tunis(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)61 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)37(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)86(COLUMN)73 Barbados(COLUMN)fair(COLUMN)85 Bermuda(COLUMN)cloudy(COLUMN)72(COLUMN)64 Calgary(COLUMN)snow(COLUMN)25(COLUMN)-2 Culiacan(COLUMN)clear(COLUMN)79(COLUMN)55 Edmonton(COLUMN)snow(COLUMN)16(COLUMN)1 Havana(COLUMN)cloudy(COLUMN)25(COLUMN)66 Kingston(COLUMN)fair(COLUMN)86(COLUMN)73 Montego Bay(COLUMN)fair(COLUMN)85(COLUMN)71 Mexico City(COLUMN)haze(COLUMN)23(COLUMN)47 Monterrey(COLUMN)cloudy(COLUMN)45(COLUMN)37 Montreal(COLUMN)snow(COLUMN)12(COLUMN)1 Nassau(COLUMN)rain(COLUMN)82(COLUMN)64 Ottawa(COLUMN)cloudy(COLUMN)12(COLUMN)5 Regina(COLUMN)clear(COLUMN)14(COLUMN)8 St. Kitts(COLUMN)fair(COLUMN)84(COLUMN)72 St. Thomas(COLUMN)Fair(COLUMN)85(COLUMN)72 Toronto(COLUMN)clear(COLUMN)23(COLUMN)7 Vancouver(COLUMN)snow(COLUMN)34(COLUMN)23 Veracruz(COLUMN)cloudy(COLUMN)77(COLUMN)59 Winnipeg(COLUMN)cloudy(COLUMN)14(COLUMN)5(END TABLE)